The Miami Dolphins rookie linebacker, described by defensive coordinator Matt Burke as a “kid at heart,” participates in the postgame jersey exchange, a years-old NFL practice that has become even more prevalent with the league’s current crop of youngsters. Usually players exchange with ex-college teammates, former NFL teammates, friends from high school, guys they know.

Baker, who has five NFL games under his belt, aimed a bit higher. He revealed he had postgame plans to approach New England quarterback Tom Brady for a jersey exchange two weeks ago when the Dolphins visited the Patriots.

“I’m not one of those guys that would shy away from it,” he said. “I’d definitely ask if I could.”

At the very least, Baker planned to have his jersey signed by Brady or have Brady sign a glove, anything. Baker figured that if he had a sack, interception or any type of big play against...